[PATCH RFC 57/77] pmcraid: Update MSI/MSI-X interrupts enablement code

Alexander Gordeev
2013-10-02T10:49:13Z

As result of recent re-design of the MSI/MSI-X interrupts enabling
pattern this driver has to be updated to use the new technique to
obtain a optimal number of MSI/MSI-X interrupts required.

Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
---
drivers/scsi/pmcraid.c | 23 +++++++++++------------
1 files changed, 11 insertions(+), 12 deletions(-)

diff --git a/drivers/scsi/pmcraid.c b/drivers/scsi/pmcraid.c
index 1eb7b028..5c62d22 100644
--- a/drivers/scsi/pmcraid.c
+++ b/drivers/scsi/pmcraid.c
@@ -4680,24 +4680,23 @@ pmcraid_register_interrupt_handler(struct pmcraid_instance *pinstance)

if ((pmcraid_enable_msix) &&
(pci_find_capability(pdev, PCI_CAP_ID_MSIX))) {
- int num_hrrq = PMCRAID_NUM_MSIX_VECTORS;
struct msix_entry entries[PMCRAID_NUM_MSIX_VECTORS];
+ int num_hrrq = ARRAY_SIZE(entries);
int i;
- for (i = 0; i < PMCRAID_NUM_MSIX_VECTORS; i++)
- entries[i].entry = i;
-
- rc = pci_enable_msix(pdev, entries, num_hrrq);
- if (rc < 0)
- goto pmcraid_isr_legacy;

/* Check how many MSIX vectors are allocated and register
* msi-x handlers for each of them giving appropriate buffer
*/
- if (rc > 0) {
- num_hrrq = rc;
- if (pci_enable_msix(pdev, entries, num_hrrq))
- goto pmcraid_isr_legacy;
- }
+ rc = pci_msix_table_size(pdev);
+ if (rc < 0)
+ goto pmcraid_isr_legacy;
+
+ num_hrrq = min(num_hrrq, rc);
+ for (i = 0; i < num_hrrq; i++)
+ entries[i].entry = i;
+
+ if (pci_enable_msix(pdev, entries, num_hrrq))
+ goto pmcraid_isr_legacy;

for (i = 0; i < num_hrrq; i++) {
pinstance->hrrq_vector[i].hrrq_id = i;
--
1.7.7.6